SQLite数据库储存图片信息，GridView显示，基本实现添加、删除图标操作 ... ...

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sqlite数据库储存图片信息，GridView显示，基本实现添加、删除图标操作

效果图如下：

废话不多说，直接上代码：

MainActivity.java

[代码]java代码：

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package com.database.sqlite;
import java.util.List;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
/**
* 主菜单类
*
*
*
* @author 小赵
*
*/
public class MainActivity extends Activity {
private GridView gridView;
private PictureAdapter adapter;
private DBContror dbcon;
private List<Picture> mylist;
private Intent intent;
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
//标题栏自定义设置
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.title);
TextView tv = (TextView) findViewById(R.id.textTile);
tv.setText(R.string.main_menu);
dbcon = new DBContror( this ); // 初始化数据库
mylist = dbcon.queryAllItem(); // 查询数据库中的全部数据，并存放到List<Picture>中
intent = new Intent();
gridView = (GridView) findViewById(R.id.gridview);
adapter = new PictureAdapter(mylist, this ); // 自定义适配器
gridView.setAdapter(adapter);
gridView.setOnItemClickListener( new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,View v,
int position,long id) {
OnClickGridViewItem(position); // 点击事件
}
});
}
/**
* GridView中图标点击事件
*
* @param position
*/
protected void OnClickGridViewItem(int position) {
String result = mylist.get(position).getTitle();
if (result.endsWith( "商城" )) {
// 进入AppStore
intent.setClass(MainActivity. this ,AppStoreActivity.class);
MainActivity. this .startActivity(intent);
} else {
Toast.makeText(MainActivity. this ,mylist.get(position).getTitle(),
Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onResume() {
super .onResume();
mylist = dbcon.queryAllItem();
adapter = new PictureAdapter(mylist, this );
adapter.notifyDataSetChanged();
gridView.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main,menu); //功能菜单键
return true ;
}
/**
* 功能菜单选项
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.About:
Toast.makeText(MainActivity. this , "关于" ,Toast.LENGTH_SHORT).show();
break ;
case R.id.Exit:
// Toast.makeText(MainActivity.this,"退出",Toast.LENGTH_SHORT).show();
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
am.restartPackage(getPackageName());
intent.setClass( this ,MainActivity.class);
Intent i = new Intent(Intent.ACTION_MAIN);
i.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
startActivity(i);
break ;
default :
break ;
}
return false ;
}
/**
* 管理应用（删除操作）
*
* @param view
*/
public void OnManage(View view) {
intent.setClass(MainActivity. this ,ManageActivity.class);
this .startActivity(intent);
}
@H_616_301@ /**
* 禁用返回键
*/
public void onBackPressed() {
}
}


主菜单布局XML

main.xml

[代码]xml代码：

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<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "@L_403_8@"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:layout_gravity= "left"
android:background= "@drawable/top_image"
android:orientation= "vertical"
android:weightSum= "2" >
<LinearLayout
xmlns:android= "@L_403_8@"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:background= "@drawable/top_image"
android:orientation= "horizontal" >
<!-- 帮助按钮 -->
<Button
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "bottom|center"
android:layout_weight= "1"
android:background= "@drawable/btn_home_bg"
android:gravity= "center"
android:text= "@string/help"
android:textColor= "#000000"
android:textSize= "15dip" />
<TextView
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_weight= "2" />
<!-- 返回主页按钮 -->
<Button
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "bottom|center"
android:layout_weight= "1"
android:background= "@drawable/btn_home_bg"
android:gravity= "center"
android:onClick= "OnManage"
android:text= "@string/manage"
android:textColor= "#000000"
android:textSize= "15dip" />
</LinearLayout>
<GridView
xmlns:android= "@L_403_8@"
android:id= "@+id/gridview"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:columnWidth= "80dip"
android:gravity= "center"
android:horizontalSpacing= "5dip"
android:numColumns= "auto_fit"
android:stretchMode= "columnWidth"
android:verticalSpacing= "5dip" />
</LinearLayout>


标题布局：

title.xml

[代码]xml代码：

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<?xml version= "1.0" encoding= "utf-8" ?>
<!-- 标题栏文字设置 -->
<LinearLayout xmlns:android= "@L_403_8@"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "center" >
<TextView
android:id= "@+id/textTile"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:textColor= "#FFFFFF"
android:textStyle= "bold"
android:textSize= "18dip" />
</LinearLayout>


菜单选项布局：

main.xml

[代码]xml代码：

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<menu xmlns:android= "@L_403_8@" >
<item
android:id= "@+id/About"
android:orderInCategory= "100"
android:title= "@string/menu_about" />
<item
android:id= "@+id/Exit"
android:orderInCategory= "100"
android:title= "@string/menu_cancel" />
</menu>


创建数据类：

DBHelper.java

[代码]java代码：

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package com.database.sqlite;
import android.content.Context;
import android.database.sqlite.sqliteDatabase;
import android.database.sqlite.sqliteOpenHelper;
/**
* 创建数据库
*
* @author 小赵
*
*/
public class DBHelper extends sqliteOpenHelper {
public DBHelper(Context context) {
super (context,Gloable.DB_NAME, null ,Gloable.DB_VERSION);
}
/**
* 创建数据库
*/
@Override
public void onCreate(sqliteDatabase db) {
String sql = "CREATE TABLE IF NOT EXISTS "
+ Gloable.TABLE_NAME
+ "(id INTEGER PRIMARY KEY NOT NULL,pictureId INTEGER NOT NULL,pictureName varchar not null)" ;
db.execsql(sql);
}
@Override
public void onUpgrade(sqliteDatabase arg0,int arg1,int arg2) {
}
}

数据库操作类：

DBContror.java


[代码]java代码：

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package com.database.sqlite;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.sqliteDatabase;
/**
* 数据库操作类
*
* @author 小赵
*
*/
public class DBContror {
private DBHelper picdb;
private List<Picture> all = new ArrayList<Picture>();
public DBContror(Context context) {
picdb = new DBHelper(context);
all = queryAllItem(); // 查询全部数据
// 如果不存在数据就初始化数据库并添加数据
if (all.size() > 0) {
} else {
initDB(getData());
}
}
/**
* 数据库初始化
*
* @param value
* @return
*/
private long initDB(List<Picture> value) {
long row = 0;
sqliteDatabase db = picdb.getWritableDatabase();
picdb.onCreate(db);
ContentValues values = null ;
Picture map = null ;
try {
while (value.size() > 0) {
map = value.remove(0);
values = new ContentValues();
values.put( "pictureId" ,map.getImageId());
values.put( "pictureName" ,map.getTitle());
row = db.insert(Gloable.TABLE_NAME,values);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (db.isOpen()) {
db.close();
}
}
return row;
}
/**
* 添加数据
*
* @param picBean
* @return
*/
public long insertItem(Picture picBean) {
long row = 0;
try {
sqliteDatabase db = picdb.getWritableDatabase();
picdb.onCreate(db);
ContentValues contentValues = new ContentValues();
contentValues.put( "pictureId" ,picBean.getImageId());
contentValues.put( "pictureName" ,picBean.getTitle());
row = db.insert(Gloable.TABLE_NAME,contentValues);
db.close();
} catch (Exception e) {
}
return row;
}
/**
* 按名称删除指定名称（name）的数据
*
* @param name
* @return
*/
public int deleteById(String name) {
int i = 0;
try {
String[] sb = new String[1];
sb[0] = name;
sqliteDatabase db = picdb.getWritableDatabase();
picdb.onCreate(db);
i = db. delete (Gloable.TABLE_NAME, "pictureName=?" ,sb);
} catch (Exception e) {
}
return i;
}
/**
* 查询数据库中是否存在名称为name的数据
*
* @param name
* @return
*/
public boolean checkByName(String name) {
Cursor cursor;
try {
sqliteDatabase db = picdb.getWritableDatabase();
picdb.onCreate(db);
cursor = db.query(Gloable.TABLE_NAME,
new String[] { name }, null );
cursor.moveToFirst();
int count = cursor.getCount();
db.close();
if (count > 0) {
cursor.close();
return true ;
}
cursor.close();
} catch (Exception e) {
}
return false ;
}
/**
* 查询数据库所有的数据
*
@H_616_301@ * @return
*/
public List<Picture> queryAllItem() {
sqliteDatabase db = picdb.getReadableDatabase();
picdb.onCreate(db);
List<Picture> pictures = new ArrayList<Picture>();
try {
Cursor cursor = db.query(Gloable.TABLE_NAME,
null , null );
while (cursor.moveToNext()) {
Picture picture = new Picture();
picture.setImageId(cursor.getInt(cursor
.getColumnIndex( "pictureId" )));
picture.setTitle(cursor.getString(cursor
.getColumnIndex( "pictureName" )));
pictures.add(picture);
}
cursor.close();
db.close();
} catch (Exception e) { }
return pictures;
}
/**
* 查看picture数据库是否已经存在该图片
*/
public boolean checkPic(Picture picture) {
try {
sqliteDatabase db = picdb.getWritableDatabase();
picdb.onCreate(db);
String clientCode = picture.getTitle();
Cursor cursor = db.query(Gloable.TABLE_NAME,
new String[] { clientCode }, null );
cursor.moveToFirst();
int count = cursor.getCount();
db.close();
if (count > 0) {
cursor.close();
return true ;
}
cursor.close();
} catch (Exception e) { }
return false ;
}
/**
* 初始化添加系统数据
*
* @return
*/
private List<Picture> getData() {
List<Picture> list = new ArrayList<Picture>();
for (int i = 0; i < Gloable.IMAGES.length; i++) {
Picture picture = new Picture();
picture.setImageId(Gloable.IMAGES[i]);
picture.setTitle(Gloable.TITLES[i]);
list.add(picture);
}
return list;
}
}

适配器类PictureAdapter.java


[代码]java代码：

@H_750_4044@
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package com.database.sqlite;
import java.util.List;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
/**
* 适配器类PictureAdapter
*
* @author 小赵
*
*/
public class PictureAdapter extends BaseAdapter {
List<Picture> pictures;
Context context;
public PictureAdapter(List<Picture> pic_list,Context context) {
super ();
this .pictures = pic_list;
this .context = context;
}
@Override
public int getCount() {
if ( null != pictures) {
return pictures.size();
} else {
return 0;
}
}
@Override
public Object getItem(int position) {
return pictures.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position,View convertView,ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(context);
ViewHolder viewHolder;
if (convertView == null ) {
convertView = inflater.inflate(R.layout.picture_item, null );
viewHolder = new ViewHolder();
viewHolder.title = (TextView) convertView.findViewById(R.id.title);
viewHolder.image = (ImageView) convertView.findViewById(R.id.image);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.title.setText((CharSequence) pictures.get(position)
.getTitle());
viewHolder.title.setTextColor(Color.BLACK);
viewHolder.image.setImageResource(pictures.get(position).getImageId());
return convertView;
}
}
class ViewHolder {
public TextView title;
public ImageView image;
}


图片Bean类：

Picture.java

[代码]java代码：

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package com.database.sqlite;
public class Picture {
private String title; //图片名称
private int imageId; //图片ID(位置)
public Picture() {
super ();
}
public Picture(String title,int imageId) {
super ();
this .title = title;
this .imageId = imageId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this .title = title;
}
public int getImageId() {
return imageId;
}
public void setImageId(int imageId) {
this .imageId = imageId;
}
}

管理界面类：

ManageActivity.java


[代码]java代码：

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package com.database.sqlite;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
/**
* 管理界面（用于删除操作）
*
* @author 小赵
*
*/
public class ManageActivity extends Activity {
private GridView gridView;
private PictureAdapter adapter;
private Intent intent;
private DBContror dbcon;
private List<Picture> mylist;
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.manage);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.title);
TextView tv = (TextView) findViewById(R.id.textTile);
tv.setText(R.string. delete );
dbcon = new DBContror( this );
mylist = dbcon.queryAllItem();
intent = new Intent();
gridView = (GridView) findViewById(R.id.gridview);
adapter = new PictureAdapter(mylist, this );
gridView.setAdapter(adapter);
gridView.setOnItemClickListener( new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
int position,long id) {
if (position < 2) {
Toast.makeText(ManageActivity. this , "系统应用，无法删除！正在返回请稍后……" ,
Toast.LENGTH_SHORT).show();
} else {
dbcon.deleteById(mylist.get(position).getTitle());
adapter.notifyDataSetChanged();
Toast.makeText(ManageActivity. this , "删除成功！正在返回请稍后……" ,
Toast.LENGTH_SHORT).show();
}
onBack( null );
}
});
}
public void onBack(View view) {
intent.setClass(ManageActivity. this ,MainActivity.class);
ManageActivity. this .startActivity(intent);
}
public void onMain(View view) {
intent.setClass(ManageActivity. this ,MainActivity.class);
ManageActivity. this .startActivity(intent);
}
/**
* 禁用返回键
*/
public void onBackPressed() {
}
}


管理布局类：

Manage.xml

[代码]xml代码：

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<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "@L_403_8@"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:layout_gravity= "left"
android:orientation= "vertical"
android:weightSum= "2" >
<LinearLayout
xmlns:android= "@L_403_8@"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:background= "@drawable/top_image"
android:orientation= "horizontal" >
<!-- 帮助按钮 -->
<Button
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "bottom|center"
android:layout_weight= "1"
android:gravity= "center"
android:text= "@string/back"
android:background= "@drawable/btn_home_bg"
android:onClick= "onBack"
android:textColor= "#FF0000"
android:textSize= "15dip" />
<TextView
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_weight= "2" />
<!-- 返回主页按钮 -->
<Button
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "bottom|center"
android:layout_weight= "1"
android:gravity= "center"
android:text= "@string/main"
android:onClick= "onMain"
android:background= "@drawable/btn_home_bg"
android:textColor= "#FF0000"
android:textSize= "15dip" />
</LinearLayout>
<GridView
xmlns:android= "@L_403_8@"
android:id= "@+id/gridview"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:columnWidth= "80dip"
android:gravity= "center"
android:horizontalSpacing= "5dip"
android:numColumns= "auto_fit"
android:stretchMode= "columnWidth"
android:verticalSpacing= "5dip" />
</LinearLayout>

应用商城类：

AppStoreActivity.java


[代码]java代码：

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package com.database.sqlite;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
/**
* 商城
*
* @author 小赵
*
*/
public class AppStoreActivity extends Activity {
private GridView gridView;
private PictureAdapter adapter;
private Intent intent;
private List<Picture> mylist;
private DBContror dbcon;
public String[] addtitles = new String[] { "博客" , "历史" , "计算器" , "分享" , "微博" ,
"时钟" };
public Integer[] addimages = new Integer[] { R.drawable.blog,
R.drawable.history,R.drawable.calculator,R.drawable.share,
R.drawable.weibo,R.drawable.time };
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.manage);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.title);
TextView tv = (TextView) findViewById(R.id.textTile);
tv.setText(R.string.add);
dbcon = new DBContror( this );
intent = new Intent();
gridView = (GridView) findViewById(R.id.gridview);
mylist = new ArrayList<Picture>();
for (int i = 0; i < addtitles.length; i++) {
Picture newPic = new Picture();
newPic.setImageId(addimages[i]);
newPic.setTitle(addtitles[i]);
mylist.add(newPic);
}
adapter = new PictureAdapter(mylist, this );
gridView.setAdapter(adapter);
gridView.setOnItemClickListener( new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
int position,long id) {
if (dbcon.checkByName(mylist.get(position).getTitle())) {
Toast.makeText(AppStoreActivity. this ,
"该应用已经存在无法再次添加！正在返回请稍后……" ,Toast.LENGTH_SHORT)
.show();
} else {
dbcon.insertItem(mylist.get(position));
adapter.notifyDataSetChanged();
Toast.makeText(AppStoreActivity. this , "添加成功！正在返回请稍后……" ,
Toast.LENGTH_SHORT).show();
}
intent.setClass(AppStoreActivity. this ,MainActivity.class);
AppStoreActivity. this .startActivity(intent);
}
});
}
/**
* 返回
*
* @param view
*/
public void onBack(View view) {
intent.setClass(AppStoreActivity. this ,MainActivity.class);
AppStoreActivity. this .startActivity(intent);
}
/**
* 返回主页
*
* @param view
*/
public void onMain(View view) {
intent.setClass(AppStoreActivity. this ,MainActivity.class);
AppStoreActivity. this .startActivity(intent);
}
/**
* 禁用返回键
*/
public void onBackPressed() {
}
}

商城布局和管理布局一样，可以共用一个，呵呵……

全局变量类：

Gloable.java


[代码]java代码：

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package com.database.sqlite;
/**
* 全局资源类
*
* @author 小赵
*
*/
public class Gloable {
public static String[] TITLES = new String[] { "商城" , "测试1" , "测试2" , "测试3" };
public static Integer[] IMAGES = new Integer[] { R.drawable.appstore,
R.drawable.test1,R.drawable.test2,R.drawable.test3 };
public static String DB_NAME = "pictureDB" ;
public static String TABLE_NAME = "picture" ;
public static int DB_VERSION = 1;
}

图片item类：

picture_item.xml

[代码]xml代码：

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<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "@L_403_8@"
android:id= "@+id/root"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:orientation= "vertical" >
<TextView
android:layout_width= "wrap_content"
android:layout_height= "wrap_content" />
<ImageView
android:id= "@+id/image"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "center"
android:contentDescription= "@string/app_name"
android:padding= "4dp"
android:scaleType= "fitXY" />
<TextView
android:id= "@+id/title"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "center"
android:gravity= "center_horizontal" />
</LinearLayout>

String类：

string.xml


[代码]xml代码：

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<resources>
<string name= "app_name" >sqliteDemo</string>
<string name= "hello_world" >Hello world!</string>
<string name= "menu_settings" >设置</string>
<!-- 界面标题 -->
<string name= "main_menu" >主菜单</string>
<string name= "shop_list" >商城应用</string>
<string name= "local_list" >本地应用</string>
<!-- 标题上的选择按钮 -->
<string name= "help" >帮助</string>
<string name= "main" >主页</string>
<string name= "back" >返回</string>
<string name= "manage" >管理</string>
<string name= "delete" >点击图标删除</string>
<string name= "add" >点击图标添加应用</string>
<!-- 菜单功能键下的控件 -->
<string name= "menu_about" >关于</string>
<string name= "menu_cancel" >退出</string>
</resources>

最后需要添加如下权限：


[代码]xml代码：

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<uses-permission android:name= "android.permission.RESTART_PACKAGES" />

资源图片呢，没有找到在哪里添加附件，以后再说……只是数据库操作的小Demo，希望各位大虾多多指教，相互学习！！！

最后附上工程结构图：

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